msm: camera: cci: Add CCI Global reset during CCI HW init

During first CCI HW initialization, CCI HW global reset has to be called.
Removed is_initialized removed, as it can be controlled through
master_active_slave ref count to verify there is any active slave or not.

CRs-Fixed: 2782553
Change-Id: Id845bfc936b976e160231ed3a0acbc951c32ad7f
Signed-off-by: Anil Kumar Kanakanti <akanakan@codeaurora.org>